CSIS 82 ASSIGNMENT 3
DUE: Next Thursday
Chapter 5 Power Commands
Name:
Enter the command to solve the problem in column on the right. Refer to Tutorial Sheet on
Powerful Unix Commands
1 Log into terra
2 find out who is logged into the system
3 get more information about one of the users
4 add to your answer for (2) to show users alphabetically (use
pipe)
5 Use a ls option to determine what is the last modified file in
the ../cs82 dir
what is filename?
6 list all filenames in cs82 dir and redirect output (>) into a file
cs82list in your home dir
7 repeat (6) with a recursive –R option and lists subdirectories
as well and put in cs82rec_list in your home dir
8 repeat (7) with a wild card to only show .txt files, put in file
cs82rec_txt_list
9 copy the whole cs82 dir to your home dir
10 rm –R this directory, abort, then repeat using force option
to override –i alias
11 make alias for pico so you just have to type p file to edit
12 sort the contents of your cs82rec_list file
13 repeat (12) and pipe into wc –w to determine how many
files
14 repeat (12) and pipe into uniq, then wc to determine how
many unique filenames
15 make a new file prob15 using touch
15 change permission of prob15 so only group can read and
write, everyone else (user and other) nothing
16 change permission of prob15 to -r-x--x-w- using numbers
17 change permission of prob15 to -rwx-wx-w- using symbol
method (example: ugo+rwx) etc
18 change owner of prob15 to tom
can you change back?
19 Repeat step 9…who is owner of all the files in your cs82
copy?
20 Recursively make all files and subdirs in cs82 rwx for user
only
21 Use find to find all files called ncurses.h on whole
system…is it there? What dir is it in?
22 Use grep to find all files containing the word "ncurses.h" in
whole system